Skip to content

A Door Made of Fungus!

Mycelium grows fast, making it a great building material.
Two hands hold a square board made of a white, cracked material.

© Peter Endig/dpa—picture alliance/Getty Images

This material was made from a part of a fungus called mycelium. It can be used to create doors.

The word fungus makes some people cringe, but not all fungus is bad. In fact, the yeast in our bread and the mushrooms on our plates are both fungi. Now, a company in Denmark has developed a door with fungus as a main material.

Danish company Rebound worked with an architectural company (a company that designs buildings) to develop a door that contains mycelium. Mycelium is a bit like the roots of a fungus. If you were to dig a mushroom out from the ground, the mycelium would be the part that’s underground.

A mushroom is growing, and white mycelium can be seen near the ground at the base of the mushroom.

© Christine Whitehead/Alamy

The white stuff in this photo is mycelium.

Why use mycelium instead of wood to make a door? Unlike trees, which grow slowly, mycelium grows quickly, so it’s easy to produce. 

Rebound grows the mycelium in a door-shaped mold with a wooden frame. In only about two weeks, the material grows into a panel that’s lightweight but strong enough to be used as an interior (inside) door. Like wooden doors, mycelium doors help block sounds. Their handles are made from recycled seashells.

The architects decided to use this technology to make doors because the natural material has a special look that’s not at all like wood. Mycelium doors are details that can make a home more interesting.

And if anything happens to a mycelium door, it won’t take long to create a new one. That’s the beauty of fast-growing fungus.

Face Thinking Icon

Did You Know?

A composite shows soy sauce being poured, cheese with green veins, and bread next to a jar of starter.

© bravissimos, Prostock-studio, innazagorulko/stock.adobe.com; Photo composite Encyclopædia Britannica, Inc.

Many foods are made using fungi, including soy sauce, cheese, and bread.

How Fungus Changed the World

Alexander Fleming sits at a lab table studying fungus in a petri dish, and an inset shows an image of what the fungus looks like.

© Chris Ware—Keystone Features/Getty Images, © Catolla—iStock/Getty Images; Photo illustration Encyclopædia Britannica, Inc.

This photo shows Alexander Fleming at work. The inset shows what the mold he found might have looked like. 

Antibiotics are amazing. These medications can stop many infections, like strep throat, before they become dangerous. Antibiotics wouldn’t exist if it weren’t for fungus.

Scottish doctor Alexander Fleming discovered the power of fungus in 1928. Fleming was trying to figure out how to stop certain kinds of bacteria, which can cause disease. Before leaving for vacation, Fleming put some bacteria called Staphylococcus on a culture plate (a piece of equipment on which bacteria can be grown). When he came back, he found that mold, a type of fungus, had begun to grow on the bacteria. The part of the bacteria with the mold on it had stopped growing. 

Fleming, along with other scientists, figured out which part of the mold could control the bacteria and named it penicillin. Penicillin became the world’s first antibiotic.

Antibiotics changed the world by stopping countless infections in their tracks!

More Fungus Facts

A purple mushroom grows in a dark forest.

© Herbert/stock.adobe.com

A fungus is a living thing, but it’s not a plant or an animal. How does a fungus grow, and when is it harmful? You can learn more at Britannica!

Word of the Day Icon

WHAT'S THE WORD?

proliferate

Part of speech:

verb

Definition:

: to increase in number or amount quickly

Definitions provided by
Merriam-Webster Logo
Game Icon

Play

Word Search

Can you find all the words?

.

In Case You Missed It

Farmers get annoyed when elephants eat their crops. But it’s possible the elephants understand that certain plants are great medicine.
June 4, 2026
Krista Richard fixes up old bikes and gives them to children.
June 2, 2026
Chinese workers helped build a railroad that stretched across the United States and changed the country.
May 28, 2026
Scientists have discovered that bull sharks often hang out with other bull sharks.
May 24, 2026

How to Cite This Page

Here is how to cite this page using the MLA style. While every effort has been made to follow citation style rules, there may be some differences. Please refer to the appropriate style manual or other sources if you have any questions.

In the News: A Door Made of Fungus.Britannica School, Encyclopaedia Britannica, 10 June 2026. https://news.eb.com/level1/a-door-made-of-fungus. Accessed 11 June 2026 [Replace this date with today’s date.]